I did that when I started my Clay journey. Choose the person/company wisely. If you perform well, try to get a paid gig or at least a testimonial.
I believe it is a good idea to commit to at least 3-6 months for one project.
Hey Gio -
You would have to push the data to external sequencers for this.
Either you have one for each channel
Instantly/Smartlead for emails
HeyReach - for LinkedIn in
Or send that to multi channel sequencer
SalesForge
LaGrowthMachine etc.